linux-kernel - Re: [PATCH v2 11/36] platform/x86: intel_scu_ipc: Drop intel_scu_ipc_raw

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Date:   Wed, 8 Jan 2020 18:42:11 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Lee Jones <lee.jones@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Zha Qipeng <qipeng.zha@...el.com>,
        Rajneesh Bhardwaj <rajneesh.bhardwaj@...ux.intel.com>,
        "David E . Box" <david.e.box@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 11/36] platform/x86: intel_scu_ipc: Drop
 intel_scu_ipc_raw_command()

On Wed, Jan 08, 2020 at 02:41:36PM +0300, Mika Westerberg wrote:
> There is no user for this function so we can drop it from the driver.
> 

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
>  arch/x86/include/asm/intel_scu_ipc.h |  2 -
>  drivers/platform/x86/intel_scu_ipc.c | 63 ----------------------------
>  2 files changed, 65 deletions(-)
> 
> diff --git a/arch/x86/include/asm/intel_scu_ipc.h b/arch/x86/include/asm/intel_scu_ipc.h
> index b59afa59a4cb..2a1442ba6e78 100644
> --- a/arch/x86/include/asm/intel_scu_ipc.h
> +++ b/arch/x86/include/asm/intel_scu_ipc.h
> @@ -38,8 +38,6 @@ int intel_scu_ipc_update_register(u16 addr, u8 data, u8 mask);
>  int intel_scu_ipc_simple_command(int cmd, int sub);
>  int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
>  			  u32 *out, int outlen);
> -int intel_scu_ipc_raw_command(int cmd, int sub, u8 *in, int inlen,
> -			      u32 *out, int outlen, u32 dptr, u32 sptr);
>  
>  extern struct blocking_notifier_head intel_scu_notifier;
>  
> diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
> index ba857e54800b..93a810fa6c8a 100644
> --- a/drivers/platform/x86/intel_scu_ipc.c
> +++ b/drivers/platform/x86/intel_scu_ipc.c
> @@ -383,69 +383,6 @@ int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
>  }
>  EXPORT_SYMBOL(intel_scu_ipc_command);
>  
> -#define IPC_SPTR		0x08
> -#define IPC_DPTR		0x0C
> -
> -/**
> - * intel_scu_ipc_raw_command() - IPC command with data and pointers
> - * @cmd:	IPC command code.
> - * @sub:	IPC command sub type.
> - * @in:		input data of this IPC command.
> - * @inlen:	input data length in dwords.
> - * @out:	output data of this IPC command.
> - * @outlen:	output data length in dwords.
> - * @sptr:	data writing to SPTR register.
> - * @dptr:	data writing to DPTR register.
> - *
> - * Send an IPC command to SCU with input/output data and source/dest pointers.
> - *
> - * Return:	an IPC error code or 0 on success.
> - */
> -int intel_scu_ipc_raw_command(int cmd, int sub, u8 *in, int inlen,
> -			      u32 *out, int outlen, u32 dptr, u32 sptr)
> -{
> -	struct intel_scu_ipc_dev *scu = &ipcdev;
> -	int inbuflen = DIV_ROUND_UP(inlen, 4);
> -	u32 inbuf[4];
> -	int i, err;
> -
> -	/* Up to 16 bytes */
> -	if (inbuflen > 4)
> -		return -EINVAL;
> -
> -	mutex_lock(&ipclock);
> -	if (scu->dev == NULL) {
> -		mutex_unlock(&ipclock);
> -		return -ENODEV;
> -	}
> -
> -	writel(dptr, scu->ipc_base + IPC_DPTR);
> -	writel(sptr, scu->ipc_base + IPC_SPTR);
> -
> -	/*
> -	 * SRAM controller doesn't support 8-bit writes, it only
> -	 * supports 32-bit writes, so we have to copy input data into
> -	 * the temporary buffer, and SCU FW will use the inlen to
> -	 * determine the actual input data length in the temporary
> -	 * buffer.
> -	 */
> -	memcpy(inbuf, in, inlen);
> -
> -	for (i = 0; i < inbuflen; i++)
> -		ipc_data_writel(scu, inbuf[i], 4 * i);
> -
> -	ipc_command(scu, (inlen << 16) | (sub << 12) | cmd);
> -	err = intel_scu_ipc_check_status(scu);
> -	if (!err) {
> -		for (i = 0; i < outlen; i++)
> -			*out++ = ipc_data_readl(scu, 4 * i);
> -	}
> -
> -	mutex_unlock(&ipclock);
> -	return err;
> -}
> -EXPORT_SYMBOL_GPL(intel_scu_ipc_raw_command);
> -
>  /*
>   * Interrupt handler gets called when ioc bit of IPC_COMMAND_REG set to 1
>   * When ioc bit is set to 1, caller api must wait for interrupt handler called
> -- 
> 2.24.1
> 

-- 
With Best Regards,
Andy Shevchenko